Green preparation method of silicon rubber/silicon dioxide pervaporation membrane based on emulsion film forming

The invention relates to a green preparation method of a silicon rubber/silicon dioxide pervaporation membrane based on emulsion film forming and belongs to the technical field of membrane separation. The green preparation method has main characteristics that (1) mixing and emulsifying water-soluble sol, a surfactant and polysiloxane to prepare water-in-oil polysiloxane emulsion, wherein the diameter of water-phase liquid drops is 1-45 microns; and (2) adding a catalyst and a cross-linking agent and mixing to obtain an emulsion type membrane casting solution, coating the emulsion type membrane casting solution on a polyvinylidene fluoride ultrafiltration membrane, and carrying out drying and cross-linking to prepare the silicon rubber/silicon dioxide pervaporation membrane. Based on an emulsion film forming technology, any organic solvent is not added in a membrane preparation process, so that volatile organic steam is not generated and a green and environment-friendly membrane preparation concept is met. The prepared hybridized silicon rubber pervaporation membrane has the characteristics of large permeation flux, good separation effect, stable structure and the like, is suitable for removing low-concentration organic matters in water and is particularly suitable for separating low-molecular-weight alcohols in a fermentation solution.